package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.util.Args;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Component
@Slf4j
@Aspect
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    private void autoFillIU() {}

    @Before("autoFillIU()")
    public void autoFill(JoinPoint joinPoint) throws Exception {
        log.info("Auto filling aspect");

        //获取注解属性
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = methodSignature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = autoFill.value();

        //获取方法参数对象的set方法
        Object[] args = joinPoint.getArgs();
        if(args == null || args.length == 0) {
            return;
        }

        Object entity = args[0];
        Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
        Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
        Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
        Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

        //赋值
        if(value.equals(OperationType.INSERT))
        {
            setCreateTime.invoke(entity, LocalDateTime.now());
            setUpdateTime.invoke(entity, LocalDateTime.now());
            setCreateUser.invoke(entity, BaseContext.getCurrentId());
            setUpdateUser.invoke(entity, BaseContext.getCurrentId());
        }
        else if(value.equals(OperationType.UPDATE))
        {
            setUpdateTime.invoke(entity, LocalDateTime.now());
            setUpdateUser.invoke(entity, BaseContext.getCurrentId());
        }
    }

}
